Pulverized fuel locomotive boiler



July 18, 1933. w, KLEINOW 1,918,401

PULVERIZED FUEL LOCOMOTIVE BOILER Original Filed March 24. 1927 Inventor Walter KleLnow, E dZMMZOW His Attorngg.

" Patented July 18, 1933 i I is 1 rnqmunrnn nnnxrnrcrrars ensnnnscnnr'r,, o'rjnnntm, G RMAnY; Ar ana) l J i fl rruvsmzsa FUEL nocomorlvn BOILER Original application filed March 24, 1927, Seria1 n. 178,073, and in German m .1, 1925. Divided. and

' a this application filed October 22, 1929. Serial No. 401,550.

This application is a division of the plication of Walter Kleinow, Albert Morgenroth, Friedrich Reinhardt and Wilhelm Bauer, Serial No. .17 8,073, filed March 24, 1927, issued as Patent #1139935. The invention relates to furnaces, and especially to furnaces for burning pulverulent fuel, and has for its object to provide an improved construction and arrangement in a furnace of this type. 7

In the case of locomotives with grate firing, the possibility is always present that,

during rest periods, an equal steam COIlClltlOlT in the boiler can be maintained for a longer period by means of banking the fire. How-1 ever, in locomotives burning pulverized coal,

a fast pressure drop in the'boiler occurs when the burner is closed as the glowlng wall in the fire box of the boiler heatingsurface cools gradually and can supply heat for a short time only.

Temporary opening and closing of the large or mainburner is possible, but not advisable as too large and sudden heat supplies cause unallowable heatstresses in the material and possible damage to the places where the materialis rolled. It has been suggested to provide a small auxiliary pulverized-coal burner besides the main burners. These auxiliary burners, however, have always been arranged in such a way that the flames of the main burner are directed to them. The prevailing opinion was that such an opposition of the main and auxiliary burners was absolutely necessary foragood lighting. It was, however, incidental that" the auxiliary burners wouldburn up in a short time under theinfiuence of the flames which were shooting out of the main burner;

The object of this invention is'to provide an improved arrangement whereby these disadvantages are eliminated, and to this end I provide, besides the main burners -.which are arranged abovelthe ash box and which blow the fuel mainly horizontally or upwards into the firebox, an auxiliaryburner in order to maintain a constant steam condition in the boiler when the main-burners are closed, and also to insure lighting of the main burners, which small auxiliary burner is located outside of: the reach of the flames-of v the main burner. This arrangement conj stitutes an advantageous solution of the problem to keep the boilerunder steam in aneconomical and dependable way in case of anextended interval during which the boil er is not inoperation'and the main burners are shut off, and also to inducea lighting of the pulverized coal when the main burners are opened, without having to use a special Wood or. torch fire.

In the drawing, the

figure is a sectional view, in. part diagrammatic, of a construction embodying the invention.

Referring to the drawing, 1 indicates a firebox or combustion chamber provided in the lower portion of the furnace and heated with pulverized coal, the pulverized coal; being supplied by the'burner nozzles 2, which are built into the sides of the fire box. There after the manner'disclosed in the patent referred to above. 'The necessary combustion a1r is supplied in any usualor known way,

to application. The burners discharge the pulverized fuel and air in a horizontal and upward direction. Located adjacent to the end of auxiliary burner 3 isa special lighting arch 5, which is formed of fire clay, and due to its becoming heated insures a perfect lighting of the 'pulverizedfuel discharged from.

the auxiliary burner 3.

With the above described arrangement, 5 I it will be seen that the auxiliary burner '3 is located out of the path of the flames from be damaged by the heat from them. At the. sametime, however, itis so located as to be effective to perform its intended function.

byLetters Patent of the United States is:

the main burners'2, so thatit isnot likely to T 1 05 What I claim asnew and desire to secure 1.;In a pulverized fuel locomotive, the

combination of a'fire box and an ash box, a main burner having a pluralityof slots for' '70 maybe two burner nozzles, one running along each side of the fire box and facing each other such as that disclosed in the above referred l -main burner whereby it is out of the. path of fiames'of the main burner, and means for lightingthe auxiliary burner comprising an arch located between the auxiliary burner and the main burner.

2. A' furnace for pulverule'nt' fuelcompris ing a combustion chamber in the lower portion of said furnace, amain burner in said combustion chamber provided with a plurality of slots for the discharge of fuel, and

means-for heatingthe furnace while the main burner is out of'operation, said means com-' prising an auxiliary'burner located out of the path of flames of the main burner, and f during'operation of said mainburner for v lighting the auxiliary burner. V

WALTER KLEINOW.

as I

ajlighting arch near the main burner heated izs I 

